Agree with above.
There is absolutely no harm in being over-cautious at this point.
If it turns out you were over-cautious, you can look back and laugh... if in fact it is fully justified, you will be very very glad you did. I don't think you lose anything (a few expenses) by acting cautiously. Look on it as insurance in safety and sanity.
"Trying to address every issue with him because I feel like we both deserve to have covered it all. There’s no questions then, no come backs."
Drop the list until you are safely away, if not completely.
There clearly are questions and comebacks. So many people have said as a police officer he could be building a case based on the paper incident.
His flip flopping of nice/nasty behaviour. Coming with you to the shops - under the circumstances that could just be checking up on you. No reason for him to come at all.. and as for making sure you buy the right lunch materials for him? Why??? I also think his sudden taking days off is for the same reason... to see what you are up to. He's spent time talking to friends and relatives after all and is probably getting similar advice on how to handle you.
One of the reasons you've felt compelled to leave is because of his meanness, financially, emotionally, this feels to me that having had a list of his faults read out and being financially worse off, not to mention the humiliation of being called out by the person he thought he was controlling - I do think he will want his revenge in one way or another. He cares about his own well being, not yours. Reading a further list of how he's hurt you - is not going to have the reaction you'd expect. He won't feel a moments guilt or self-reflection.
As others have advised. Disengage completely, whilst maintaining a civil front. Stall as much as possible, say you just need time to think as you don't know what to do. Do not let him goad you into a reaction like the paper thing again. (Deny it each and every time he mentions it but don't go into explainations - just repeat You know that is not true) Bright and breezy grey rock. Don't give away any more hints or indications of your plans. You don't have to answer questions or respond in any way to more goading. Just polite and calm, I don't feel this is the right time to discuss this, or similar